Purchase Order - Fully delivered

Hi!

We have a casuistic in the purchase order.

The purchase order is already completed, and the EM is recived. Therefore, the purchase order is fully delivered and the icon in the delivery tab is activated.

Is more probably that the purchase order changed because the price in the supplier invoice is not the same.

When we changed the price in the purchase order, this icon 'Fully delivered' is desactivated, and this is not correct, because the purchase order is fully delivered. ¿Why ocurred this situation? ¿Could we to do the process diferent for not ocurred this changed?

Now, we changed of masive form the purchase order, but we think this is not correct...

I hope a solution.

Thanks so much!!!

Best Regards.